A wind turbine gearbox oil circuit lubrication detection system and method

Abstract

The application discloses a kind of wind power gear box oil circuit lubrication detection system and method, it is related to wind power generation technical field, the present application is to accurately detect the lubrication of gear box, the power generation and wind intensity of the same time are detected matching by processing unit, judge whether there is abnormality, if no abnormality, continue to judge the rotation angle of wind power fan blade and wind intensity value matching, detect the rotation angle of wind power fan blade under current wind intensity is abnormal;If no abnormality, through the cycle unit, investigate several groups of corresponding time wind intensity and wind power fan blade rotation angle in a certain time period, it is matched by processing unit, if all there is mismatch phenomenon, there is abnormality;Finally if still no abnormality, by judging value PL processing, by the way of step-by-step detection, accurately judge whether there is rotation abnormality in gear box, to judge whether lubrication system appears fault.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a wind power gear box oil circuit lubrication detection system and method. BACKGROUND

[0002] The wind power gear box is one of the core components of the wind turbine, and its working principle is as follows: the wind pushes the blades of the unit to rotate, and the rotation speed and torque are transmitted to the low-speed stage of the gear box, and through the conversion of the transmission mechanism inside the gear box, the high-speed stage is finally converted to output the power to the generator to achieve the purpose of wind power generation.

[0003] The wind power gear box is a main bearing component in the wind turbine unit, and it is very important to reduce the size and weight of the component in the small cabin space, so it is required to be small in size and light in weight. Since the gear box is at a height of dozens of meters, it is extremely difficult to maintain and hoist, and the gear box is used in a very unstable working condition and in a very harsh environment, so it is required to have high reliability, long service life (20 years of operation life), and convenient maintenance.

[0004] The design of the gear box must ensure that the reliability and the expected service life are met, and stable and reliable components and materials with good mechanical properties are selected, and complete and sufficient lubrication, cooling system and monitoring device are provided, which are necessary prerequisite conditions for designing the gear box.

[0005] In the patent document with the application number 201110256682.9, a rapid detection method and detection device for the lubricating oil circuit of the wind power gear box are disclosed, and specifically disclosed is that the oil circuit inside the gear box is detected by using an external oil supply electric pump to determine whether the gear box is blocked.

[0006] However, the oil supply inside the gear box not only has the defect of blockage, but also the oil quantity and quality are guarantees for the normal operation of the gear box, especially the quality of the oil, which can cause the following consequences: gear tooth surface pitting, gear tooth surface gluing, gear tooth surface indentation, gear tooth surface shedding, gear tooth breaking, gear tooth surface plastic deformation, bearing damage, etc. The reason is that the lubrication is insufficient and the impact load is caused, for example, the wind turbine fault shutdown time in the main control program of a certain wind farm is about 60s, and it is a straight-line shutdown. This control strategy has a large impact on the gear box. Therefore, maintaining the stability of the oil circuit inside the gear box is a necessary condition for the normal operation of the gear box. SUMMARY

[0007] The present application provides a wind power gear box oil circuit lubrication detection system and method.

[0008] The technical problem solved by the present application is that the oil circuit detection of the gear box only relies on the external oil circuit to detect the oil circuit of the gear box, which cannot meet the requirement of accurate detection of the gear box, and cannot quickly detect the abnormality in the early stage, which may cause serious consequences over time.

[0009] The present application can be realized by the following technical scheme: a wind power gear box oil circuit lubrication detection system, comprising a gear box and a gear rotation detection module, the gear rotation detection module comprising a wind power detection unit, a power generation monitoring unit and a processing unit, the wind power detection unit being arranged at the top of the wind power generation equipment and used for sensing the wind strength at the height of the wind power generation equipment, the power generation monitoring unit being used for monitoring the power generation of the wind power generation equipment, the processing unit acquiring the power generation and the wind strength in the same time from the power generation monitoring unit and the wind power detection unit, the processing unit matching the power generation and the wind strength, and the judging unit judging whether the gear box is abnormal according to the matching value of the processing unit.

[0010] The further technical improvement of the present application is that the gear rotation detection module further comprises a wind fan blade rotation angle detection unit used for detecting the rotation angle of the wind fan blade, the processing unit matches the wind strength and the rotation angle of the wind fan blade, and the judging unit judges whether the gear box is abnormal according to the matching value of the processing unit.

[0011] The further technical improvement of the present application is that the gear rotation detection module further comprises a supplement unit used for supplementing the wind fan blade rotation angle and the power generation in a plurality of time periods when the wind fan blade rotation angle and the wind strength can be matched, forming a plurality of sets, dividing the plurality of sets into M groups, processing each group, that is, PL is a judgment value, R and P are preset coefficients, Nhu is the radian of the rotation of the wind fan blade, QW is the corresponding power generation, A is the number of sets contained in each group, the judgment value is processed to judge whether the gear box is abnormal.

[0012] The further technical improvement of the present application is that the processing unit arranges the obtained judgment values in time sequence to obtain a judgment table related to time, obtains an arc line through the discretization of the points, obtains an arc line changing with time, transmits the arc line to a control platform for display control, and the processing unit takes the initial judgment value as the evaluation standard for the remaining judgment values, obtains a difference value through PL0-PL, PL0 is the initial judgment value, and the judging unit judges the difference value to judge whether the gear box is abnormal.

[0013] The further technical improvement of the present application is that the present application further comprises a viscous detection device, the viscous detection device samples the oil of the gear box, sends the oil viscosity to the processing unit, and the oil viscosity is related to the size of the preset value P.

[0014] The further technical improvement of the present application is that the filter tank is connected with the storage oil tank, the inside of the storage oil tank is provided with a cooling device, a temperature sensor is arranged in the inside of the storage oil tank for detecting the temperature of the oil from the filter tank, and the output end of the storage oil tank is connected with the gear box.

[0015] The further technical improvement of the present application is that the filter tank is connected with the storage oil tank, the inside of the storage oil tank is provided with a cooling device, a temperature sensor is arranged in the inside of the storage oil tank for detecting the temperature of the oil from the filter tank, and the output end of the storage oil tank is connected with the gear box.

[0016] The further technical improvement of the present application is that the filter tank is connected with the storage oil tank, the inside of the storage oil tank is provided with a cooling device, a temperature sensor is arranged in the inside of the storage oil tank for detecting the temperature of the oil from the filter tank, and the output end of the storage oil tank is connected with the gear box.

[0017] The further technical improvement of the present application is that the filter tank is connected with the storage oil tank, the inside of the storage oil tank is provided with a cooling device, a temperature sensor is arranged in the inside of the storage oil tank for detecting the temperature of the oil from the filter tank, and the output end of the storage oil tank is connected with the gear box.

[0018] The further technical improvement of the present application is that the filter tank is connected with the storage oil tank, the inside of the storage oil tank is provided with a cooling device, a temperature sensor is arranged in the inside of the storage oil tank for detecting the temperature of the oil from the filter tank, and the output end of the storage oil tank is connected with the gear box.

[0019] Step one, according to the period setting unit, the oil in the gear box is discharged into the filter tank for filtering, and the oil in the storage oil tank which is fully cooled by the cooling device is introduced into the gear box.

[0020] Step two, by judging the content of the oil in the storage oil tank introduced into the gear box and the oil in the filter tank discharged from the gear box, whether the oil circuit of the gear box is blocked is judged, and by judging the relationship between the wind strength and the power generation, whether the oil circuit of the gear box is abnormal is judged.

[0021] Step three, when the oil circuit in the gear box is blocked, the oil in the filter tank is sucked into the gear box by the booster pump, and the gear in the gear box rotates to uniformly disperse the blocked impurities in the oil.

[0022] Step four, when the relationship among the wind strength, the rotating angle of the wind fan blade and the power generation is abnormal, it is judged that the oil circuit of the gear box is abnormal.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] 1、The application is to accurately detect the lubrication of the gear box, the power generation and the wind strength at the same time are detected and matched by the processing unit to determine whether the power generation is abnormal, if not, the rotation angle of the wind fan blade and the wind strength value are matched to determine whether the rotation angle of the wind fan blade is abnormal under the current wind strength; if not, the processing unit matches the wind strength and the rotation angle of the wind fan blade at corresponding time within a certain time period through the cycle unit, if there is a mismatch, it is abnormal and needs to be warned; finally, if there is still no abnormality, the following formula is used for processing, to obtain the judgment value PL, the processing unit arranges the obtained judgment value in time sequence to obtain a judgment table related to time, and obtains an arc line changing with time through the arc line of discrete points, and transmits the above arc line to the control platform for display control, so that the change of the judgment value can be known through the change rule of the arc line, and the processing unit stores the initial judgment value, and takes the initial judgment value as the evaluation standard of the remaining judgment values, that is, the initial judgment value is recorded as PL0, the difference value is obtained by PL0-PL, the judgment value is obtained by judging the size of the difference value, the gear in the gear box is normally rotated through the above step-by-step detection, which can avoid detecting whether the lubrication in the gear box is normal only by the blockage of the oil circuit, the precision of the application is high, the reliability is high, the damage to the equipment caused by the direct stop of the wind fan blade in general case is avoided, and the wind power generation equipment is protected.

[0025] 2、The oil circuit blockage in the application is solved by the booster pump, that is, the control valve on the circulating oil circuit is closed, the control valve on the booster pump is opened, the oil in the filter tank is sucked into the gear box by the booster pump, the oil is flushed into the gear box at a certain pressure by the existence of the booster pump, the reverse flushing of the oil circuit is realized, then the gear in the gear box rotates, the blocked impurities are uniformly dispersed in the oil, then the control valve on the booster pump is closed, the control valve on the circulating oil circuit is opened, the solution mixed with a large amount of impurities is introduced into the filter tank, the oil is discharged from the storage tank, the oil is replaced, when there are too many impurities in the oil circuit and the impurities are too small, the replacement of the oil can realize the protection of the oil circuit and the protection of the gear box. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to facilitate the understanding of those skilled in the art, the application will be further described below in combination with the drawings.

[0027] Fig. 1 The system block diagram of the application;

[0028] Fig. 2 A schematic diagram of the oil circuit connection of the gear box of the present application. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined inventive purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0030] Referring to Figs. 1-2 As shown in the drawings, a wind power gear box oil circuit lubrication detection system includes a gear box, wherein the gear box is directly connected to a filter box for filtering impurities in the oil in the gear box through the filter box, and the oil after filtering the impurities is introduced into the gear box again. In this embodiment, a metal impurity detection device is arranged in the filter box for detecting the content of metal impurities in the oil. Since the metal impurities are in the form of particles and mostly fall from the mechanical structure inside the gear box, they will cause friction to the gear with the rotation of the gear, and will cause damage to the gear box over time. Therefore, in this application, the metal impurity detection device and the filter box are used to detect and filter out the metal impurities.

[0031] The system further includes a cycle setting unit. Since the detection cycle of the metal impurities is set, the metal impurities in the oil are detected through a certain set cycle, i.e. the oil discharged from the gear box into the filter box is detected at time T set by the cycle setting unit. When the content of the detected impurities is less than the preset value, the detection is performed at time T as the cycle. If the content of the detected impurities is greater than the preset value, the detection is performed within nT time, where n is between 0 and 1, and the detection cycle is reduced, so that the occurrence frequency of the impurities can be known to determine whether the gear box is abnormal, and the impurities can be quickly cleaned to avoid blockage.

[0032] The system further includes a signal sending module. The content of the detected impurities is sent to a control platform for display and monitoring through the signal sending module. Before the fault occurs, the gear box is stopped and repaired through artificial detection to reduce the occurrence of the gear box fault.

[0033] Meanwhile in the present application, the filter box is connected with the gear box through the storage oil tank, the inside of the storage oil tank is provided with certain cooling equipment, the temperature of the oil liquid from the inside of the filter box is detected through the temperature sensor inside the storage oil tank, if the temperature of the oil liquid is too high, the oil liquid is cooled through the cooling equipment, the oil liquid after cooling is input into the inside of the gear box, the oil liquid in the inside of the gear box is treated in circulation, the temperature and the impurity content of the oil liquid in the inside of the gear box are ensured to be in normal level. If the temperature sensor senses that the temperature of the oil liquid is too high and reaches the level of temperature abnormality, it is judged that the gear box may be in failure, because when the gear box is in failure, the rotating speed in the inside of the gear box is fast under the action of the mechanical brake, thus certain heat is generated due to the too fast speed and is difficult to be discharged, so the existence of the abnormality is directly detected through the temperature sensor, the temperature detected by the temperature sensor is transmitted to the control platform, the control platform makes a temperature table according to time and temperature, which is used for directly displaying the temperature in the inside of the gear box.

[0034] Further, if the oil liquid has too many impurities and directly leads to the blockage of the gear box, in the present application, when the oil liquid is transmitted into the gear box through the storage oil tank, certain oil liquid enters into the filter box, the oil liquid in the inside of the gear box is replaced, when the oil liquid entering into the inside of the gear box and the oil liquid flowing out of the gear box are not in proportion, it is judged that the gear box is blocked at this time. This process can be detected through the flow pump, or can be detected through the liquid level sensor in the inside of the gear box when the gear box is stationary, when working normally, the detection through the flow pump is more practical. The flow pump also transmits the detected result to the control platform for display, the control platform is used to realize whether the oil passage of the gear box is blocked.

[0035] When the oil passage in the inside of the gear box is blocked, the gear box and the filter box are directly connected with the booster pump, a branch pipeline is arranged in parallel on the through oil passage between the gear box and the filter box, which is the booster oil passage, the booster pump is arranged on the booster oil passage, control valves are arranged at both ends of the booster pump, and corresponding control valves are arranged on the oil passage in parallel with the through oil passage and the booster pump. When used normally, the oil liquid enters into the inside of the filter box through the gear box and the through oil passage; when the oil passage is blocked, the control valve on the through oil passage is closed and the control valve on the booster pump is opened, the oil liquid in the inside of the filter box is sucked into the inside of the gear box through the booster pump, the oil liquid is rushed into the inside of the gear box with certain pressure through the existence of the booster pump, the back flushing of the oil passage is realized, then the impurities blocked in blocks are uniformly scattered in the oil liquid through the rotation of the gear in the inside of the gear box, then the control valve on the booster pump is closed and the control valve on the through oil passage is opened, the solution mixed with a large amount of impurities is input into the inside of the filter box, the oil liquid is discharged at the position of the storage oil tank, the oil liquid is replaced.

[0036] In this process, when the booster pump starts to operate in reverse, the filter part inside the filter tank is closed to avoid bringing the impurities filtered on the filter part back into the gear box, and the oil in the storage tank is used to flush the gear box to solve the problem of blockage.

[0037] Therefore, a new oil tank is also connected to the gear box for comprehensive replacement of the oil in the gear box to achieve comprehensive filtering of impurities in the gear box and ensure normal operation of the gear box. In this application, when the oil in the gear box is discharged, the gears inside the gear box are stopped by the brake device, and then the oil in the gear box is replaced by the liquid level sensor. In this application, three oil levels are set, L1, L2, and L3, where L3 is the highest value, and L2 is the intermediate value. First, the new oil tank discharges oil into the gear box until it stops at L3, then the oil is discharged to L2, at which point the oil in the gear box is only L2-L3, then the oil is refilled until the oil reaches L3 again, and the oil is discharged to L1, and finally the oil is refilled to L2 to replace the oil, at which point the gear box can operate normally.

[0038] In this application, if the oil lubrication effect of the gear box is poor, causing abnormal rotation of the gear, the application can detect the torque that the gear needs to bear when rotating to detect whether the gear is abnormal, i.e. to detect the lubrication effect of the oil circuit. Since the gear is driven by the rotation of the wind turbine blades to generate electricity, it is difficult and not intuitive to directly detect the gear, so the application detects by input and output.

[0039] That is, the gear rotation detection module includes a wind power detection unit, a processing unit, and a power generation monitoring unit. In this application, the wind power detection unit is arranged at the top of the wind power generation device to sense the wind strength at the height and send the wind strength to the processing unit. Then use the power generation monitoring unit to monitor the power generation of the wind power generation device and send the power generation to the processing unit. The processing unit detects and matches the power generation and wind strength at the same time to determine whether the power generation is abnormal.

[0040] Further, the processing unit uses the normal power generation matched with the wind strength to determine whether the power generation is abnormal. If there is an abnormality, it is directly determined that the wind power generation device is abnormal and needs to be repaired. This is applicable when the abnormality is significant and greatly affects the power generation efficiency, which can be directly detected.

[0041] In order to ensure the precision of the detection, a wind blade rotation angle detection unit is arranged in the application to detect the rotation angle of the wind blade. The wind blade rotates around the center when subjected to wind force to generate electricity. The wind blade rotation angle detection unit monitors the rotation angle of the wind blade in real time and sends the rotation angle of the wind blade in a unit time to the processing unit. The processing unit matches the wind blade and the wind strength value to detect whether the rotation angle of the wind blade is abnormal under the current wind strength.

[0042] Therefore, the rotation angle of the wind blade needs to be monitored in real time. However, since the wind blade is not circular, monitoring the rotation angle of the wind blade alone cannot directly determine the regularity. Therefore, a cycle unit is arranged. The cycle unit investigates the wind strength and the rotation angle of the wind blade corresponding to a plurality of groups of time within a certain time period and matches them through the processing unit. If there is a mismatch, it is abnormal and needs to be alerted. An abnormal signal is sent to the control platform for abnormal display.

[0043] The rotation of the wind blade is equal to the rotation of the gear box, which generates electricity. Therefore, when the rotation angle of the wind blade and the wind strength can be matched, the power generation is small, and it is difficult to determine whether it is abnormal. Therefore, in the application, the rotation angle of the wind blade and the power generation in a plurality of time periods are retrieved to form a plurality of sets. The plurality of sets are divided into M groups, each group including A sets. The data in each set is processed to determine the regularity and determine whether there is an abnormality, i.e., using the following formula for processing, where R and P are preset coefficients, Nhu is the radian of the rotation of the wind blade, and QW is the corresponding power generation. The judgment value PL is obtained. The size of the judgment value is used to determine the correlation between the rotation angle of the wind blade and the wind strength of the current group. Then, the above formula is used to calculate a plurality of judgment values. All judgment values are collected and uploaded to the processing unit for processing. The processing unit arranges the obtained judgment values in chronological order to obtain a judgment table related to time. Through the arc line of the discrete points, an arc line changing with time is obtained. The above arc line is transmitted to the control platform for display control. Therefore, the change of the judgment value can be known through the change rule of the arc line, and the initial judgment value is stored in the processing unit. The initial judgment value is used as the evaluation standard for the remaining judgment values, i.e., the initial judgment value is recorded as PL0. The difference between PL0 and PL is obtained. The size of the difference is used to determine whether the judgment value is abnormal. If it is abnormal, it means that there is a problem in the gear box, which needs to be monitored manually to avoid the damage of the wind turbine to the wind power generation equipment caused by the linear shutdown of the wind turbine or the insufficient utilization of the wind force.

[0044] In the present application, since the viscosity of the oil changes with the impurities in the oil, a viscosity detection device is also provided in the present application. The viscosity of the oil is obtained by sampling the oil, so as to detect the viscosity of the oil and determine whether the use meets the standard. In the present application, the data output end of the viscosity detection device is connected to the processing unit, and the data is processed by the processing unit, that is, the data of the viscosity detection device is associated with the size of the preset value P. Because the lubricating effect of the viscous oil will be correspondingly reduced, the meshing between the gears will have a certain resistance, which will affect the power generation to some extent. Therefore, in the present application, the viscosity of the oil is considered to detect whether there is an abnormality. At the same time, the viscosity detection device also sends the viscosity of the oil to the control platform, which monitors the viscosity of the oil and determines the quality of the oil used to determine whether the oil needs to be replaced.

[0045] Further, in order to ensure that the oil can be uniformly distributed in the gear box, in the present application, the gear is immersed in the gear box. The content of the oil in the gear box is set. When the gear rotates, the oil will be brought up with the gear, and the oil will be splashed on the bearing seat to lubricate the bearing seat. Because the oil is splashed, there will be a dead angle that is difficult to splash, so the present application also uses an outlet position setting to supplement, that is, the oil replacement and the inlet of the oil circulation are arranged on the main transformer bearing in the gear box, so as to directly immerse the main transformer bearing and ensure the lubrication of the main transformer bearing and the stability of the main transformer bearing.

[0046] In the bearing, a sampling port is also arranged, which can sample the oil content in the bearing to determine whether there is oil in the bearing, so as to ensure the stability of the rotating bearing while ensuring the meshing rotation of the gear.

[0047] A wind power gear box oil circuit lubrication detection method, specifically comprising the following steps:

[0048] First, the oil in the gear box is discharged into the filter box for filtration according to the period setting unit. The metal impurity detection device detects the impurity content in the oil in the filter box. If the impurity content exceeds the preset value, the detection period set by the period setting unit is changed. Then, the filtered oil in the filter box flows into the storage tank. At the same time, the oil in the storage tank is fully cooled by the cooling equipment and enters the gear box, so as to realize the full replacement of the oil in the gear box and ensure the temperature of the oil in the gear box and the normal work of the gear box.

[0049] Meanwhile, the impurity content is sent to the control platform through the signal sending module, and the control platform is used for monitoring the impurity content and the temperature of the oil liquid. After the control platform obtains the value, the abnormal value is monitored, the gear box can be paused and repaired before the failure occurs, and the probability of the failure of the gear box is reduced.

[0050] If the oil liquid content cannot be proportional to the set regulation when the storage tank transmits the oil liquid into the gear box and the oil liquid is discharged from the gear box to the filter tank, it indicates that the oil circuit of the gear box is blocked, and the problem of blockage can be solved by using the booster pump. That is, the control valve on the circulating oil circuit is closed, the control valve on the booster pump is opened, the oil liquid in the filter tank is sucked into the gear box by using the booster pump, the oil liquid is flushed into the gear box at a certain pressure by using the existence of the booster pump, the backflushing of the oil circuit is realized, then the gear in the gear box is rotated to uniformly disperse the blocked impurities in the oil liquid, then the control valve on the booster pump is closed, the control valve on the circulating oil circuit is opened, and the solution mixed with a large amount of impurities is introduced into the filter tank. The oil liquid is discharged from the storage tank, and the oil liquid is replaced.

[0051] The new oil is used to replace the oil liquid in the gear box through the new oil tank. Specifically, the new oil tank discharges the oil liquid into the gear box until it stops at the L3 position. Then the oil liquid is discharged to the L2 position. The discharged oil liquid is directly discharged from the storage tank position and is waste oil liquid. At this time, the oil liquid in the gear box is only the amount of L2-L3 position. Then the oil liquid is refilled until the oil liquid reaches L3 again. The oil liquid is continuously discharged to the L1 position. The discharged oil liquid is directly discharged from the storage tank position and is waste oil liquid. Finally, the oil liquid is refilled to the L2 position to replace the oil liquid. At this time, the gear box can work normally. The oil liquid in the filter tank, the storage tank and the gear box is new and replaced.

[0052] In order to detect the lubrication of the gear box, a gear rotation detection module is further used for detection. First, the power generation and wind strength at the same time are detected and matched by the processing unit to determine whether the power generation is abnormal. If there is no abnormality, the rotation angle of the wind fan blade and the wind strength value are matched to detect whether the rotation angle of the wind fan blade is abnormal under the current wind strength. If there is no abnormality, the wind strength and the rotation angle of the wind fan blade at corresponding times within a certain time period are investigated by the circulation unit, and the matching is performed by the processing unit. If there is a mismatch, it is abnormal and needs to be warned. Finally, if there is still no abnormality, the following formula is used for processing, The processing unit arranges the obtained judgment values in time sequence to obtain a judgment table related to time, obtains an arc line changing with time through arc line of discrete points, and transmits the arc line to a control platform for display control, so that the change of the judgment value can be known through the change rule of the arc line. The processing unit stores the initial judgment value, and takes the initial judgment value as a basis to evaluate the remaining judgment values, that is, the initial judgment value is recorded as PL0. The difference value is obtained by PL0-PL, and whether the judgment value is abnormal is obtained by judging the size of the difference value. If it is abnormal, it indicates that there is a problem in the gearbox, and human monitoring is needed to avoid the damage of the wind power generation equipment caused by the straight-line shutdown of the fan or the insufficient use of wind power.

[0053] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A wind turbine gearbox oil circuit lubrication detection system, characterized in that: The system includes a gearbox and a gear rotation detection module. The gear rotation detection module includes a wind power detection unit, a power generation monitoring unit, and a processing unit. The wind power detection unit is located at the top of the wind power generation equipment to sense the wind intensity at the height of the equipment. The power generation monitoring unit monitors the power generation of the equipment. The processing unit obtains the power generation and wind intensity from the power generation monitoring unit and the wind power detection unit at the same time. The processing unit matches the power generation and wind intensity, and a judgment unit determines whether there is an abnormality in the gearbox based on the matching values ​​from the processing unit. The gear rotation detection module also includes a wind turbine blade rotation angle detection unit, which is used to detect the rotation angle of the wind turbine blade. The processing unit matches the wind intensity and the rotation angle of the wind turbine blade, and the judgment unit judges whether there is an abnormality in the gearbox through the matching value of the processing unit. The gear rotation detection module also includes a supplementary unit. When the rotation angle of the wind turbine blades and the wind intensity can be matched, the supplementary unit retrieves the rotation angle and power generation of the wind turbine blades over several time periods, forming several sets. These sets are then divided into M groups, and each group is processed. PL is the judgment value, R and P are preset coefficients, Nhu is the radian of the wind turbine blade rotation, QW is the corresponding power generation, and A is the number of sets contained in each group. By processing the judgment value, it is determined whether there is an abnormality in the gearbox. It also includes a viscosity detection device that samples the oil in the gearbox and sends the oil viscosity to the processing unit. The oil viscosity is associated with a preset value P.

2. The wind turbine gearbox oil circuit lubrication detection system according to claim 1, characterized in that, The processing unit arranges the obtained judgment values ​​in chronological order to obtain a time-related judgment table. By arcing the discrete points, an arc that changes with time is obtained. The arc is then transmitted to the control platform for display control. The processing unit uses the initial judgment value as the basis for evaluating the remaining judgment values. By subtracting PL0 from PL0, the difference is obtained, where PL0 is the initial judgment value. The judgment unit then judges the difference to determine whether the gearbox is abnormal.

3. The wind turbine gearbox oil circuit lubrication detection system according to claim 2, characterized in that, It also includes a booster pump. The gearbox is connected to a filter box via a flow pipe. The filter box is used to filter the oil from the gearbox and discharge the filtered oil back into the gearbox for use. A booster oil circuit is connected in parallel on the flow pipe. The booster pump is installed on the booster oil circuit and is used to backflush the oil in the filter box into the gearbox to backflush any blockages in the flow pipe.

4. The wind turbine gearbox oil circuit lubrication detection system according to claim 3, characterized in that, The filter box is connected to the storage tank. The storage tank is equipped with a cooling device and a temperature sensor to detect the oil temperature from the filter box. The output end of the storage tank is connected to the gearbox.

5. The wind turbine gearbox oil circuit lubrication detection system according to claim 4, characterized in that, A new oil tank is connected to the gearbox, which is used to replace the oil inside the gearbox. The gearbox has three oil levels, and the oil in the gearbox is replaced according to the oil level.

6. The wind turbine gearbox oil circuit lubrication detection system according to claim 5, characterized in that, The specific process for changing the oil in the gearbox includes: setting three oil levels, namely L1, L2, and L3, where L3 is the highest value and L2 is the middle value; the new oil tank drains oil into the gearbox until it reaches the L3 position and stops; the oil in the gearbox is drained to the L2 position and the draining is paused; the new oil tank drains oil to the L3 position and stops; the oil in the gearbox is drained to the L1 position and the draining stops; the new oil tank replenishes oil to the L2 position and stops.

7. A testing method using the wind turbine gearbox oil circuit lubrication testing system as described in claim 6, characterized in that, Includes the following steps: Step 1: According to the cycle setting unit, the oil inside the gearbox is discharged into the filter box for filtration, and the oil in the storage tank is cooled by the cooling device and then enters the gearbox. Step 2: Determine if the gearbox's oil circuit is blocked by judging the amount of oil entering the gearbox from the storage tank and the amount of oil discharged from the gearbox into the filter box; determine if the gearbox's oil circuit is abnormal by judging the relationship between wind strength and power generation. Step 3: When the oil passage inside the gearbox is blocked, use a booster pump to draw the oil from the filter box into the gearbox. The gears inside the gearbox rotate, which evenly disperses the blockage impurities into the oil. Step 4: When the relationship between wind strength, wind turbine blade rotation angle and power generation is abnormal, determine that the gearbox oil circuit is abnormal.

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